Synonyms|1kAntonyms|50|Broader|26Narrower|10Related|584

69 entries under underground topic. ×

1
discreet(close, restricted, inside, clandestine)
1
disguised(clandestine, undisclosed)
1
dissembled(close, restricted, clandestine, discreet)
1
dissimulated(close, restricted, inside, clandestine)
1
incognito(close, restricted, clandestine, discreet)
1
inside(close, restricted, clandestine, discreet)
1
obscure(cover, hide, disguise, bury, secrete)
1
restricted(clandestine, discreet, undisclosed)
1
secretive(restricted, clandestine, discreet, undisclosed)
1
sub-rosa(close, clandestine, undisclosed, furtive)
1
top secret(expression, close, inside, clandestine)
1
unacknowledged(close, inside, clandestine, undisclosed)
1
under-the-table(clandestine, undisclosed)
1
under false pretense(expression, idiom, close, inside, clandestine)
1
underhand(adjective, clandestine, undisclosed)
0
abstruse(clandestine, undisclosed)
0
ambiguous(clandestine, undisclosed)
0
arcane(clandestine, undisclosed)
0
cloak-and-dagger(clandestine, undisclosed)
0
closet(clandestine, undisclosed)
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APASmart Define. (2015). sneak thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/sneak/thesaurus/synonyms
ChicagoSmart Define. 2015. "sneak thesaurus" https://smartdefine.org/sneak/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, sneak thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/sneak/thesaurus/synonyms>.
MLASmart Define. "sneak thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/sneak/thesaurus/synonyms>